Packer head



G. ALMQUIST PAGKER HEAD Aug. 28, 1934.

Filed NOV. 24, 1930 BY dud 4 NIMII Jase .NVENTOR O ATTORFE,

Patented Aug. 28, 1934 UNITED STATES Per 1 Claim.

This invention relates to a packer head for cement pipe formingmachines, the general object of the invention being to so form the headthat the concrete forming the pipes will be solidly packed and the pipeswill be practically nonporous.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawing andspecifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to theaccompanying drawing wherein like characters denote like orcorresponding parts throughout the several views, and in which:-

Figure 1 is an elevation of the improved head.

Figure 2 is a view taken at right angles to Figure 1.

Figure 3 is a section on line 3-3 of Figure 1.

Figure 4 is a section on line 4-4 of Figure 2.

Figure 5 is a top plan view.

Figure 6 is a section on line 66 of Figure 1.

As is well known, machines for forming pipes of concrete comprise acylinder having a packer head therein, with means for rotating the headand gradually raising the same so that the head will press concrete inthe cylinder into tubular form to form a pipe. The heads, as nowconstructed, consist of a cylindrical part having a spider attachedthereto which carries at each end a trowel member and wings for causingthe concrete placed in the cylinder on top of the head to pass to thesides of the cylinder, where it will be acted on by the trowel membersand then by the cylindrical part so that the concrete is pressed intotubular form.

In carrying out the invention, I provide a second set of trowel membersand a second cylinder, which are of greater diameter than the first setand which are arranged below the first set so that the second set willpack the concrete and thus make the pipe non-porous as the pipe istroweled twice instead of once.

In the drawing, the numeral 1 indicates the extension shaft which isthreaded to the lower end of the main shaft of the machine and thenumeral 2 indicates the top spider which is keyed to the shaft and hasbolted to its top part the wings 3 which cause the concrete placed inthe cylinder on top of the head to pass to the sides so that it willenter the space between the head and cylinder. The trowel members 4 arebolted to the spider and extend over the ends thereof so as to engagethe concrete. The cylinder 5 is bolted to the casting 6 which is keyedor otherwise fastened to the shaft 1 under the spider. The second spideris shown at '7 and its trowels at 8. This second spider is also keyed orotherwise fastened to the shaft and is located under the cylinder 5. Asecond casting 9 is fastened to the shaft under the spider '7. and acylinder 10 is bolted to this second spider. This second cylinder 19 andthe trowels 8 carried by the second spider '7 are of greater diameterthan the spiders and cylinder of the first set so that the second setwill compress the concrete, shaped into a pipe by the first set, so thatthe concrete forming the finished pipe is greatly compressed and isnon-porous, as the concrete is subjected to two troweling actionsinstead of one.

As is understood, the parts of the head are similar to the parts used inheads as now constructed, but I use two sets of trowel members andcylinders instead of one, with the lower set of larger diameter than thefirst set.

A nut 11 is threaded on the lower end of the shaft 1 to hold the partson the shaft.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction andin the combination and arrangement of the several parts, provided thatsuch changes fall within the scope of the appended claim.

What I claim is:-

In a packer head of the kind described, spaced upper and lower disk-likecastings, the upper casting being of slightly less diameter than thelower casting, finishing spiders above and below the upper casting anddisposed in crossed relation to each other, said spiders being formedwith curved corners at their ends and reversely disposed diametricallyopposite one another, trowelers carried by the ends of the spiders andoverhanging the curved corners thereof, cylinders fitting the castings,and a rotating shaft connecting the spiders and castings as a unit.

GUS ALMQUIST.

